For tires you want carbide studded tires with as many carbide studs as possible. And you want the tire as wide as possible too. Wide allows you to put very low pressure in the tire. You can then get more tread and studs on the snow, float on top of the snow. Instead of a narrow tire that cuts through the snow and does not put much tread on the ground. I have ordered stuff from Starbike in Germany. Including Schwalbe studded tires. With the Euro to Dollar rate at about $1.12/1 and not paying the VAT Value Added Tax if in the USA. Your price is about the same as converting the Euros directly to Dollars. Cheap compared to US bike shops.Thank you!
As for clothes to stay warm, as many as you can put on. Those chemical warmer things for toes and fingers are also good. But the best advice is to keep your rides short, short, short. 1 hour maximum or less. Ride hard for 30 minutes then get inside and get warm. Then a few hours later go for another short ride. Short, quick rides in the cold.
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